Ear plug



FIG. 1 is a left and front perspective view of an ear plug showing mynew design;

FIG. 2 is a right side elevational view thereof;

FIG. 3 is a front plan view thereof;

FIG. 4 is a top plan view thereof; and,

FIG. 5 is a rear plan view thereof.

The ornamental design for an ear plug, as shown and described.